BC817-25

The BC817-25 is a versatile NPN bipolar junction transistor (BJT) manufactured by Yangjie Electronic Technology, widely used in various electronic applications due to its reliability and performance characteristics.

Key Features:

1. Type: NPN Transistor

2. Package: Typically available in a TO-92 package, which is a cylindrical plastic housing with three leads extending from the base. This package is compact and suitable for through-hole mounting on printed circuit boards (PCBs).

3. Maximum Ratings:

   • Collector-Emitter Voltage (Vce): The BC817-25 can handle a maximum voltage of 45V, making it suitable for a range of low to medium voltage applications.
   • Collector Current (Ic): It has a maximum collector current rating of 800mA, allowing it to drive moderate loads effectively.
   • Power Dissipation (Pd): The transistor can dissipate up to 500mW, which is adequate for many small-signal applications.

4. Electrical Characteristics:

   • Current Gain (hFE): The BC817-25 features a current gain (hFE) range of 100 to 800, which indicates its efficiency in amplifying input signals. This high gain makes it suitable for use in amplifiers and switching applications.
   • Transition Frequency (fT): The transistor has a transition frequency of around 100 MHz, allowing it to operate effectively in high-frequency applications.

5. Applications:

   • The BC817-25 is commonly used in low-power amplifiers, switching applications, and signal processing circuits. It is also suitable for use in audio equipment, LED drivers, and various consumer electronics.

6. Pin Configuration:

   • The typical pin configuration for the TO-92 package is as follows:
     • Pin 1: Emitter (E)
     • Pin 2: Base (B)
     • Pin 3: Collector (C)

Performance:

The BC817-25 is known for its low noise and high linearity, making it an excellent choice for audio and RF applications. Its robust construction and thermal stability ensure reliable operation in various environmental conditions.

Conclusion:

Overall, the BC817-25 from Yangjie Electronic Technology is a reliable and efficient NPN transistor that is widely used in electronic circuits for amplification and switching purposes. Its combination of high current gain, moderate voltage and current ratings, and compact packaging makes it a popular choice among engineers and hobbyists alike.